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1da177e4 LT |
1 | /* |
2 | * dvb_ca.c: generic DVB functions for EN50221 CAM interfaces | |
3 | * | |
4 | * Copyright (C) 2004 Andrew de Quincey | |
5 | * | |
6 | * Parts of this file were based on sources as follows: | |
7 | * | |
8 | * Copyright (C) 2003 Ralph Metzler <rjkm@metzlerbros.de> | |
9 | * | |
10 | * based on code: | |
11 | * | |
12 | * Copyright (C) 1999-2002 Ralph Metzler | |
13 | * & Marcus Metzler for convergence integrated media GmbH | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License | |
17 | * as published by the Free Software Foundation; either version 2 | |
18 | * of the License, or (at your option) any later version. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, | |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | * GNU General Public License for more details. | |
bcb63314 SA |
24 | * To obtain the license, point your browser to |
25 | * http://www.gnu.org/copyleft/gpl.html | |
1da177e4 LT |
26 | */ |
27 | ||
b3ad24d2 MCC |
28 | #define pr_fmt(fmt) "dvb_ca_en50221: " fmt |
29 | ||
1da177e4 LT |
30 | #include <linux/errno.h> |
31 | #include <linux/slab.h> | |
32 | #include <linux/list.h> | |
33 | #include <linux/module.h> | |
fd1daf2e | 34 | #include <linux/nospec.h> |
1da177e4 LT |
35 | #include <linux/vmalloc.h> |
36 | #include <linux/delay.h> | |
ded92846 | 37 | #include <linux/spinlock.h> |
174cd4b1 | 38 | #include <linux/sched/signal.h> |
9320874a | 39 | #include <linux/kthread.h> |
1da177e4 LT |
40 | |
41 | #include "dvb_ca_en50221.h" | |
42 | #include "dvb_ringbuffer.h" | |
43 | ||
44 | static int dvb_ca_en50221_debug; | |
45 | ||
46 | module_param_named(cam_debug, dvb_ca_en50221_debug, int, 0644); | |
47 | MODULE_PARM_DESC(cam_debug, "enable verbose debug messages"); | |
48 | ||
b3ad24d2 MCC |
49 | #define dprintk(fmt, arg...) do { \ |
50 | if (dvb_ca_en50221_debug) \ | |
51 | printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg);\ | |
52 | } while (0) | |
1da177e4 | 53 | |
50b447d5 | 54 | #define INIT_TIMEOUT_SECS 10 |
1da177e4 LT |
55 | |
56 | #define HOST_LINK_BUF_SIZE 0x200 | |
57 | ||
58 | #define RX_BUFFER_SIZE 65535 | |
59 | ||
60 | #define MAX_RX_PACKETS_PER_ITERATION 10 | |
61 | ||
62 | #define CTRLIF_DATA 0 | |
63 | #define CTRLIF_COMMAND 1 | |
64 | #define CTRLIF_STATUS 1 | |
65 | #define CTRLIF_SIZE_LOW 2 | |
66 | #define CTRLIF_SIZE_HIGH 3 | |
67 | ||
68 | #define CMDREG_HC 1 /* Host control */ | |
69 | #define CMDREG_SW 2 /* Size write */ | |
70 | #define CMDREG_SR 4 /* Size read */ | |
71 | #define CMDREG_RS 8 /* Reset interface */ | |
72 | #define CMDREG_FRIE 0x40 /* Enable FR interrupt */ | |
73 | #define CMDREG_DAIE 0x80 /* Enable DA interrupt */ | |
74 | #define IRQEN (CMDREG_DAIE) | |
75 | ||
76 | #define STATUSREG_RE 1 /* read error */ | |
77 | #define STATUSREG_WE 2 /* write error */ | |
78 | #define STATUSREG_FR 0x40 /* module free */ | |
79 | #define STATUSREG_DA 0x80 /* data available */ | |
1da177e4 LT |
80 | |
81 | #define DVB_CA_SLOTSTATE_NONE 0 | |
82 | #define DVB_CA_SLOTSTATE_UNINITIALISED 1 | |
83 | #define DVB_CA_SLOTSTATE_RUNNING 2 | |
84 | #define DVB_CA_SLOTSTATE_INVALID 3 | |
85 | #define DVB_CA_SLOTSTATE_WAITREADY 4 | |
86 | #define DVB_CA_SLOTSTATE_VALIDATE 5 | |
87 | #define DVB_CA_SLOTSTATE_WAITFR 6 | |
88 | #define DVB_CA_SLOTSTATE_LINKINIT 7 | |
89 | ||
1da177e4 LT |
90 | /* Information on a CA slot */ |
91 | struct dvb_ca_slot { | |
1da177e4 LT |
92 | /* current state of the CAM */ |
93 | int slot_state; | |
94 | ||
d7e43844 MD |
95 | /* mutex used for serializing access to one CI slot */ |
96 | struct mutex slot_lock; | |
97 | ||
1da177e4 LT |
98 | /* Number of CAMCHANGES that have occurred since last processing */ |
99 | atomic_t camchange_count; | |
100 | ||
101 | /* Type of last CAMCHANGE */ | |
102 | int camchange_type; | |
103 | ||
104 | /* base address of CAM config */ | |
105 | u32 config_base; | |
106 | ||
107 | /* value to write into Config Control register */ | |
108 | u8 config_option; | |
109 | ||
110 | /* if 1, the CAM supports DA IRQs */ | |
111 | u8 da_irq_supported:1; | |
112 | ||
113 | /* size of the buffer to use when talking to the CAM */ | |
114 | int link_buf_size; | |
115 | ||
1da177e4 LT |
116 | /* buffer for incoming packets */ |
117 | struct dvb_ringbuffer rx_buffer; | |
118 | ||
119 | /* timer used during various states of the slot */ | |
120 | unsigned long timeout; | |
121 | }; | |
122 | ||
123 | /* Private CA-interface information */ | |
124 | struct dvb_ca_private { | |
da677fe1 | 125 | struct kref refcount; |
1da177e4 LT |
126 | |
127 | /* pointer back to the public data structure */ | |
128 | struct dvb_ca_en50221 *pub; | |
129 | ||
130 | /* the DVB device */ | |
131 | struct dvb_device *dvbdev; | |
132 | ||
133 | /* Flags describing the interface (DVB_CA_FLAG_*) */ | |
134 | u32 flags; | |
135 | ||
136 | /* number of slots supported by this CA interface */ | |
137 | unsigned int slot_count; | |
138 | ||
139 | /* information on each slot */ | |
140 | struct dvb_ca_slot *slot_info; | |
141 | ||
142 | /* wait queues for read() and write() operations */ | |
143 | wait_queue_head_t wait_queue; | |
144 | ||
145 | /* PID of the monitoring thread */ | |
9320874a | 146 | struct task_struct *thread; |
1da177e4 LT |
147 | |
148 | /* Flag indicating if the CA device is open */ | |
149 | unsigned int open:1; | |
150 | ||
151 | /* Flag indicating the thread should wake up now */ | |
152 | unsigned int wakeup:1; | |
153 | ||
154 | /* Delay the main thread should use */ | |
155 | unsigned long delay; | |
156 | ||
96375b7a JJ |
157 | /* |
158 | * Slot to start looking for data to read from in the next user-space | |
159 | * read operation | |
160 | */ | |
1da177e4 | 161 | int next_read_slot; |
30ad64b8 NS |
162 | |
163 | /* mutex serializing ioctls */ | |
164 | struct mutex ioctl_mutex; | |
1da177e4 LT |
165 | }; |
166 | ||
bd3df3c5 MK |
167 | static void dvb_ca_private_free(struct dvb_ca_private *ca) |
168 | { | |
169 | unsigned int i; | |
170 | ||
4d5030b6 | 171 | dvb_free_device(ca->dvbdev); |
bd3df3c5 MK |
172 | for (i = 0; i < ca->slot_count; i++) |
173 | vfree(ca->slot_info[i].rx_buffer.data); | |
174 | ||
175 | kfree(ca->slot_info); | |
176 | kfree(ca); | |
177 | } | |
178 | ||
da677fe1 MK |
179 | static void dvb_ca_private_release(struct kref *ref) |
180 | { | |
fbabbddd JJ |
181 | struct dvb_ca_private *ca; |
182 | ||
183 | ca = container_of(ref, struct dvb_ca_private, refcount); | |
da677fe1 MK |
184 | dvb_ca_private_free(ca); |
185 | } | |
186 | ||
187 | static void dvb_ca_private_get(struct dvb_ca_private *ca) | |
188 | { | |
189 | kref_get(&ca->refcount); | |
190 | } | |
191 | ||
192 | static void dvb_ca_private_put(struct dvb_ca_private *ca) | |
193 | { | |
194 | kref_put(&ca->refcount, dvb_ca_private_release); | |
195 | } | |
196 | ||
1da177e4 | 197 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca); |
8ec6107a JJ |
198 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, |
199 | u8 *ebuf, int ecount); | |
200 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, | |
201 | u8 *ebuf, int ecount); | |
1da177e4 | 202 | |
1da177e4 LT |
203 | /** |
204 | * Safely find needle in haystack. | |
205 | * | |
fbefb1a8 MCC |
206 | * @haystack: Buffer to look in. |
207 | * @hlen: Number of bytes in haystack. | |
208 | * @needle: Buffer to find. | |
209 | * @nlen: Number of bytes in needle. | |
46e42a30 | 210 | * return: Pointer into haystack needle was found at, or NULL if not found. |
1da177e4 | 211 | */ |
8ec6107a | 212 | static char *findstr(char *haystack, int hlen, char *needle, int nlen) |
1da177e4 LT |
213 | { |
214 | int i; | |
215 | ||
216 | if (hlen < nlen) | |
217 | return NULL; | |
218 | ||
219 | for (i = 0; i <= hlen - nlen; i++) { | |
220 | if (!strncmp(haystack + i, needle, nlen)) | |
221 | return haystack + i; | |
222 | } | |
223 | ||
224 | return NULL; | |
225 | } | |
226 | ||
96375b7a | 227 | /* ************************************************************************** */ |
1da177e4 LT |
228 | /* EN50221 physical interface functions */ |
229 | ||
46e42a30 | 230 | /* |
fbefb1a8 | 231 | * dvb_ca_en50221_check_camstatus - Check CAM status. |
1da177e4 LT |
232 | */ |
233 | static int dvb_ca_en50221_check_camstatus(struct dvb_ca_private *ca, int slot) | |
234 | { | |
a75aa90c | 235 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
236 | int slot_status; |
237 | int cam_present_now; | |
238 | int cam_changed; | |
239 | ||
240 | /* IRQ mode */ | |
7bd8cc8f | 241 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) |
a75aa90c | 242 | return (atomic_read(&sl->camchange_count) != 0); |
1da177e4 LT |
243 | |
244 | /* poll mode */ | |
245 | slot_status = ca->pub->poll_slot_status(ca->pub, slot, ca->open); | |
246 | ||
247 | cam_present_now = (slot_status & DVB_CA_EN50221_POLL_CAM_PRESENT) ? 1 : 0; | |
248 | cam_changed = (slot_status & DVB_CA_EN50221_POLL_CAM_CHANGED) ? 1 : 0; | |
249 | if (!cam_changed) { | |
a75aa90c JJ |
250 | int cam_present_old = (sl->slot_state != DVB_CA_SLOTSTATE_NONE); |
251 | ||
1da177e4 LT |
252 | cam_changed = (cam_present_now != cam_present_old); |
253 | } | |
254 | ||
255 | if (cam_changed) { | |
7bd8cc8f | 256 | if (!cam_present_now) |
a75aa90c | 257 | sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; |
7bd8cc8f | 258 | else |
a75aa90c | 259 | sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_INSERTED; |
a75aa90c | 260 | atomic_set(&sl->camchange_count, 1); |
1da177e4 | 261 | } else { |
a75aa90c | 262 | if ((sl->slot_state == DVB_CA_SLOTSTATE_WAITREADY) && |
1da177e4 | 263 | (slot_status & DVB_CA_EN50221_POLL_CAM_READY)) { |
224457a9 | 264 | /* move to validate state if reset is completed */ |
a75aa90c | 265 | sl->slot_state = DVB_CA_SLOTSTATE_VALIDATE; |
1da177e4 LT |
266 | } |
267 | } | |
268 | ||
269 | return cam_changed; | |
270 | } | |
271 | ||
1da177e4 | 272 | /** |
fbefb1a8 MCC |
273 | * dvb_ca_en50221_wait_if_status - Wait for flags to become set on the STATUS |
274 | * register on a CAM interface, checking for errors and timeout. | |
1da177e4 | 275 | * |
fbefb1a8 MCC |
276 | * @ca: CA instance. |
277 | * @slot: Slot on interface. | |
278 | * @waitfor: Flags to wait for. | |
46e42a30 | 279 | * @timeout_hz: Timeout in milliseconds. |
1da177e4 | 280 | * |
46e42a30 | 281 | * return: 0 on success, nonzero on error. |
1da177e4 LT |
282 | */ |
283 | static int dvb_ca_en50221_wait_if_status(struct dvb_ca_private *ca, int slot, | |
284 | u8 waitfor, int timeout_hz) | |
285 | { | |
286 | unsigned long timeout; | |
287 | unsigned long start; | |
288 | ||
46b4f7c1 | 289 | dprintk("%s\n", __func__); |
1da177e4 LT |
290 | |
291 | /* loop until timeout elapsed */ | |
292 | start = jiffies; | |
293 | timeout = jiffies + timeout_hz; | |
294 | while (1) { | |
fbabbddd JJ |
295 | int res; |
296 | ||
1da177e4 | 297 | /* read the status and check for error */ |
fbabbddd | 298 | res = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
1da177e4 LT |
299 | if (res < 0) |
300 | return -EIO; | |
301 | ||
302 | /* if we got the flags, it was successful! */ | |
303 | if (res & waitfor) { | |
b3ad24d2 MCC |
304 | dprintk("%s succeeded timeout:%lu\n", |
305 | __func__, jiffies - start); | |
1da177e4 LT |
306 | return 0; |
307 | } | |
308 | ||
309 | /* check for timeout */ | |
7bd8cc8f | 310 | if (time_after(jiffies, timeout)) |
1da177e4 | 311 | break; |
1da177e4 LT |
312 | |
313 | /* wait for a bit */ | |
b9af29e1 | 314 | usleep_range(1000, 1100); |
1da177e4 LT |
315 | } |
316 | ||
46b4f7c1 | 317 | dprintk("%s failed timeout:%lu\n", __func__, jiffies - start); |
1da177e4 LT |
318 | |
319 | /* if we get here, we've timed out */ | |
320 | return -ETIMEDOUT; | |
321 | } | |
322 | ||
1da177e4 | 323 | /** |
fbefb1a8 | 324 | * dvb_ca_en50221_link_init - Initialise the link layer connection to a CAM. |
1da177e4 | 325 | * |
fbefb1a8 MCC |
326 | * @ca: CA instance. |
327 | * @slot: Slot id. | |
1da177e4 | 328 | * |
46e42a30 | 329 | * return: 0 on success, nonzero on failure. |
1da177e4 LT |
330 | */ |
331 | static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot) | |
332 | { | |
a75aa90c | 333 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
334 | int ret; |
335 | int buf_size; | |
336 | u8 buf[2]; | |
337 | ||
46b4f7c1 | 338 | dprintk("%s\n", __func__); |
1da177e4 LT |
339 | |
340 | /* we'll be determining these during this function */ | |
a75aa90c | 341 | sl->da_irq_supported = 0; |
1da177e4 | 342 | |
a1ca23d1 JJ |
343 | /* |
344 | * set the host link buffer size temporarily. it will be overwritten | |
345 | * with the real negotiated size later. | |
346 | */ | |
a75aa90c | 347 | sl->link_buf_size = 2; |
1da177e4 LT |
348 | |
349 | /* read the buffer size from the CAM */ | |
bacba9e5 JJ |
350 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, |
351 | IRQEN | CMDREG_SR); | |
352 | if (ret) | |
1da177e4 | 353 | return ret; |
5dbddc99 | 354 | ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ); |
bacba9e5 | 355 | if (ret) |
1da177e4 | 356 | return ret; |
bacba9e5 JJ |
357 | ret = dvb_ca_en50221_read_data(ca, slot, buf, 2); |
358 | if (ret != 2) | |
1da177e4 | 359 | return -EIO; |
bacba9e5 JJ |
360 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); |
361 | if (ret) | |
1da177e4 LT |
362 | return ret; |
363 | ||
96375b7a JJ |
364 | /* |
365 | * store it, and choose the minimum of our buffer and the CAM's buffer | |
366 | * size | |
367 | */ | |
1da177e4 LT |
368 | buf_size = (buf[0] << 8) | buf[1]; |
369 | if (buf_size > HOST_LINK_BUF_SIZE) | |
370 | buf_size = HOST_LINK_BUF_SIZE; | |
a75aa90c | 371 | sl->link_buf_size = buf_size; |
1da177e4 LT |
372 | buf[0] = buf_size >> 8; |
373 | buf[1] = buf_size & 0xff; | |
374 | dprintk("Chosen link buffer size of %i\n", buf_size); | |
375 | ||
376 | /* write the buffer size to the CAM */ | |
bacba9e5 JJ |
377 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, |
378 | IRQEN | CMDREG_SW); | |
379 | if (ret) | |
1da177e4 | 380 | return ret; |
bacba9e5 JJ |
381 | ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10); |
382 | if (ret) | |
1da177e4 | 383 | return ret; |
bacba9e5 JJ |
384 | ret = dvb_ca_en50221_write_data(ca, slot, buf, 2); |
385 | if (ret != 2) | |
1da177e4 | 386 | return -EIO; |
bacba9e5 JJ |
387 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); |
388 | if (ret) | |
1da177e4 LT |
389 | return ret; |
390 | ||
391 | /* success */ | |
392 | return 0; | |
393 | } | |
394 | ||
395 | /** | |
fbefb1a8 | 396 | * dvb_ca_en50221_read_tuple - Read a tuple from attribute memory. |
1da177e4 | 397 | * |
fbefb1a8 MCC |
398 | * @ca: CA instance. |
399 | * @slot: Slot id. | |
400 | * @address: Address to read from. Updated. | |
46e42a30 MCC |
401 | * @tuple_type: Tuple id byte. Updated. |
402 | * @tuple_length: Tuple length. Updated. | |
fbefb1a8 | 403 | * @tuple: Dest buffer for tuple (must be 256 bytes). Updated. |
1da177e4 | 404 | * |
46e42a30 | 405 | * return: 0 on success, nonzero on error. |
1da177e4 LT |
406 | */ |
407 | static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot, | |
bacba9e5 JJ |
408 | int *address, int *tuple_type, |
409 | int *tuple_length, u8 *tuple) | |
1da177e4 LT |
410 | { |
411 | int i; | |
bacba9e5 JJ |
412 | int _tuple_type; |
413 | int _tuple_length; | |
1da177e4 LT |
414 | int _address = *address; |
415 | ||
416 | /* grab the next tuple length and type */ | |
bacba9e5 JJ |
417 | _tuple_type = ca->pub->read_attribute_mem(ca->pub, slot, _address); |
418 | if (_tuple_type < 0) | |
419 | return _tuple_type; | |
420 | if (_tuple_type == 0xff) { | |
421 | dprintk("END OF CHAIN TUPLE type:0x%x\n", _tuple_type); | |
1da177e4 | 422 | *address += 2; |
bacba9e5 JJ |
423 | *tuple_type = _tuple_type; |
424 | *tuple_length = 0; | |
1da177e4 LT |
425 | return 0; |
426 | } | |
bacba9e5 JJ |
427 | _tuple_length = ca->pub->read_attribute_mem(ca->pub, slot, |
428 | _address + 2); | |
429 | if (_tuple_length < 0) | |
430 | return _tuple_length; | |
1da177e4 LT |
431 | _address += 4; |
432 | ||
bacba9e5 | 433 | dprintk("TUPLE type:0x%x length:%i\n", _tuple_type, _tuple_length); |
1da177e4 LT |
434 | |
435 | /* read in the whole tuple */ | |
bacba9e5 | 436 | for (i = 0; i < _tuple_length; i++) { |
96375b7a JJ |
437 | tuple[i] = ca->pub->read_attribute_mem(ca->pub, slot, |
438 | _address + (i * 2)); | |
1da177e4 LT |
439 | dprintk(" 0x%02x: 0x%02x %c\n", |
440 | i, tuple[i] & 0xff, | |
441 | ((tuple[i] > 31) && (tuple[i] < 127)) ? tuple[i] : '.'); | |
442 | } | |
bacba9e5 | 443 | _address += (_tuple_length * 2); |
1da177e4 | 444 | |
224457a9 | 445 | /* success */ |
bacba9e5 JJ |
446 | *tuple_type = _tuple_type; |
447 | *tuple_length = _tuple_length; | |
1da177e4 LT |
448 | *address = _address; |
449 | return 0; | |
450 | } | |
451 | ||
1da177e4 | 452 | /** |
fbefb1a8 MCC |
453 | * dvb_ca_en50221_parse_attributes - Parse attribute memory of a CAM module, |
454 | * extracting Config register, and checking it is a DVB CAM module. | |
1da177e4 | 455 | * |
fbefb1a8 MCC |
456 | * @ca: CA instance. |
457 | * @slot: Slot id. | |
1da177e4 | 458 | * |
46e42a30 | 459 | * return: 0 on success, <0 on failure. |
1da177e4 LT |
460 | */ |
461 | static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) | |
462 | { | |
a75aa90c | 463 | struct dvb_ca_slot *sl; |
1da177e4 | 464 | int address = 0; |
bacba9e5 JJ |
465 | int tuple_length; |
466 | int tuple_type; | |
1da177e4 LT |
467 | u8 tuple[257]; |
468 | char *dvb_str; | |
469 | int rasz; | |
470 | int status; | |
471 | int got_cftableentry = 0; | |
472 | int end_chain = 0; | |
473 | int i; | |
474 | u16 manfid = 0; | |
475 | u16 devid = 0; | |
476 | ||
224457a9 | 477 | /* CISTPL_DEVICE_0A */ |
bacba9e5 JJ |
478 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
479 | &tuple_length, tuple); | |
480 | if (status < 0) | |
1da177e4 | 481 | return status; |
bacba9e5 | 482 | if (tuple_type != 0x1D) |
1da177e4 LT |
483 | return -EINVAL; |
484 | ||
224457a9 | 485 | /* CISTPL_DEVICE_0C */ |
bacba9e5 JJ |
486 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
487 | &tuple_length, tuple); | |
488 | if (status < 0) | |
1da177e4 | 489 | return status; |
bacba9e5 | 490 | if (tuple_type != 0x1C) |
1da177e4 LT |
491 | return -EINVAL; |
492 | ||
224457a9 | 493 | /* CISTPL_VERS_1 */ |
bacba9e5 JJ |
494 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
495 | &tuple_length, tuple); | |
496 | if (status < 0) | |
1da177e4 | 497 | return status; |
bacba9e5 | 498 | if (tuple_type != 0x15) |
1da177e4 LT |
499 | return -EINVAL; |
500 | ||
224457a9 | 501 | /* CISTPL_MANFID */ |
bacba9e5 JJ |
502 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
503 | &tuple_length, tuple); | |
504 | if (status < 0) | |
1da177e4 | 505 | return status; |
bacba9e5 | 506 | if (tuple_type != 0x20) |
1da177e4 | 507 | return -EINVAL; |
bacba9e5 | 508 | if (tuple_length != 4) |
1da177e4 LT |
509 | return -EINVAL; |
510 | manfid = (tuple[1] << 8) | tuple[0]; | |
511 | devid = (tuple[3] << 8) | tuple[2]; | |
512 | ||
224457a9 | 513 | /* CISTPL_CONFIG */ |
bacba9e5 JJ |
514 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
515 | &tuple_length, tuple); | |
516 | if (status < 0) | |
1da177e4 | 517 | return status; |
bacba9e5 | 518 | if (tuple_type != 0x1A) |
1da177e4 | 519 | return -EINVAL; |
bacba9e5 | 520 | if (tuple_length < 3) |
1da177e4 LT |
521 | return -EINVAL; |
522 | ||
523 | /* extract the configbase */ | |
524 | rasz = tuple[0] & 3; | |
bacba9e5 | 525 | if (tuple_length < (3 + rasz + 14)) |
1da177e4 | 526 | return -EINVAL; |
a75aa90c JJ |
527 | sl = &ca->slot_info[slot]; |
528 | sl->config_base = 0; | |
529 | for (i = 0; i < rasz + 1; i++) | |
530 | sl->config_base |= (tuple[2 + i] << (8 * i)); | |
1da177e4 LT |
531 | |
532 | /* check it contains the correct DVB string */ | |
bacba9e5 | 533 | dvb_str = findstr((char *)tuple, tuple_length, "DVB_CI_V", 8); |
13b51648 | 534 | if (!dvb_str) |
1da177e4 | 535 | return -EINVAL; |
bacba9e5 | 536 | if (tuple_length < ((dvb_str - (char *)tuple) + 12)) |
1da177e4 LT |
537 | return -EINVAL; |
538 | ||
539 | /* is it a version we support? */ | |
540 | if (strncmp(dvb_str + 8, "1.00", 4)) { | |
b3ad24d2 MCC |
541 | pr_err("dvb_ca adapter %d: Unsupported DVB CAM module version %c%c%c%c\n", |
542 | ca->dvbdev->adapter->num, dvb_str[8], dvb_str[9], | |
543 | dvb_str[10], dvb_str[11]); | |
1da177e4 LT |
544 | return -EINVAL; |
545 | } | |
546 | ||
547 | /* process the CFTABLE_ENTRY tuples, and any after those */ | |
548 | while ((!end_chain) && (address < 0x1000)) { | |
bacba9e5 JJ |
549 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, |
550 | &tuple_type, &tuple_length, | |
551 | tuple); | |
552 | if (status < 0) | |
1da177e4 | 553 | return status; |
bacba9e5 | 554 | switch (tuple_type) { |
224457a9 | 555 | case 0x1B: /* CISTPL_CFTABLE_ENTRY */ |
bacba9e5 | 556 | if (tuple_length < (2 + 11 + 17)) |
1da177e4 LT |
557 | break; |
558 | ||
559 | /* if we've already parsed one, just use it */ | |
560 | if (got_cftableentry) | |
561 | break; | |
562 | ||
563 | /* get the config option */ | |
a75aa90c | 564 | sl->config_option = tuple[0] & 0x3f; |
1da177e4 LT |
565 | |
566 | /* OK, check it contains the correct strings */ | |
bacba9e5 JJ |
567 | if (!findstr((char *)tuple, tuple_length, |
568 | "DVB_HOST", 8) || | |
569 | !findstr((char *)tuple, tuple_length, | |
570 | "DVB_CI_MODULE", 13)) | |
1da177e4 LT |
571 | break; |
572 | ||
573 | got_cftableentry = 1; | |
574 | break; | |
575 | ||
224457a9 | 576 | case 0x14: /* CISTPL_NO_LINK */ |
1da177e4 LT |
577 | break; |
578 | ||
224457a9 | 579 | case 0xFF: /* CISTPL_END */ |
1da177e4 LT |
580 | end_chain = 1; |
581 | break; | |
582 | ||
96375b7a | 583 | default: /* Unknown tuple type - just skip this tuple */ |
b3ad24d2 | 584 | dprintk("dvb_ca: Skipping unknown tuple type:0x%x length:0x%x\n", |
bacba9e5 | 585 | tuple_type, tuple_length); |
1da177e4 LT |
586 | break; |
587 | } | |
588 | } | |
589 | ||
590 | if ((address > 0x1000) || (!got_cftableentry)) | |
591 | return -EINVAL; | |
592 | ||
593 | dprintk("Valid DVB CAM detected MANID:%x DEVID:%x CONFIGBASE:0x%x CONFIGOPTION:0x%x\n", | |
a75aa90c | 594 | manfid, devid, sl->config_base, sl->config_option); |
1da177e4 | 595 | |
224457a9 | 596 | /* success! */ |
1da177e4 LT |
597 | return 0; |
598 | } | |
599 | ||
1da177e4 | 600 | /** |
fbefb1a8 | 601 | * dvb_ca_en50221_set_configoption - Set CAM's configoption correctly. |
1da177e4 | 602 | * |
fbefb1a8 MCC |
603 | * @ca: CA instance. |
604 | * @slot: Slot containing the CAM. | |
1da177e4 LT |
605 | */ |
606 | static int dvb_ca_en50221_set_configoption(struct dvb_ca_private *ca, int slot) | |
607 | { | |
a75aa90c | 608 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
609 | int configoption; |
610 | ||
46b4f7c1 | 611 | dprintk("%s\n", __func__); |
1da177e4 LT |
612 | |
613 | /* set the config option */ | |
a75aa90c JJ |
614 | ca->pub->write_attribute_mem(ca->pub, slot, sl->config_base, |
615 | sl->config_option); | |
1da177e4 LT |
616 | |
617 | /* check it */ | |
a75aa90c JJ |
618 | configoption = ca->pub->read_attribute_mem(ca->pub, slot, |
619 | sl->config_base); | |
1da177e4 | 620 | dprintk("Set configoption 0x%x, read configoption 0x%x\n", |
a75aa90c | 621 | sl->config_option, configoption & 0x3f); |
1da177e4 LT |
622 | |
623 | /* fine! */ | |
624 | return 0; | |
1da177e4 LT |
625 | } |
626 | ||
1da177e4 | 627 | /** |
fbefb1a8 MCC |
628 | * dvb_ca_en50221_read_data - This function talks to an EN50221 CAM control |
629 | * interface. It reads a buffer of data from the CAM. The data can either | |
630 | * be stored in a supplied buffer, or automatically be added to the slot's | |
631 | * rx_buffer. | |
1da177e4 | 632 | * |
fbefb1a8 MCC |
633 | * @ca: CA instance. |
634 | * @slot: Slot to read from. | |
635 | * @ebuf: If non-NULL, the data will be written to this buffer. If NULL, | |
46e42a30 MCC |
636 | * the data will be added into the buffering system as a normal |
637 | * fragment. | |
fbefb1a8 | 638 | * @ecount: Size of ebuf. Ignored if ebuf is NULL. |
1da177e4 | 639 | * |
46e42a30 | 640 | * return: Number of bytes read, or < 0 on error |
1da177e4 | 641 | */ |
8ec6107a JJ |
642 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, |
643 | u8 *ebuf, int ecount) | |
1da177e4 | 644 | { |
a75aa90c | 645 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
646 | int bytes_read; |
647 | int status; | |
648 | u8 buf[HOST_LINK_BUF_SIZE]; | |
649 | int i; | |
650 | ||
46b4f7c1 | 651 | dprintk("%s\n", __func__); |
1da177e4 LT |
652 | |
653 | /* check if we have space for a link buf in the rx_buffer */ | |
13b51648 | 654 | if (!ebuf) { |
1da177e4 LT |
655 | int buf_free; |
656 | ||
a75aa90c | 657 | if (!sl->rx_buffer.data) { |
1da177e4 LT |
658 | status = -EIO; |
659 | goto exit; | |
660 | } | |
a75aa90c | 661 | buf_free = dvb_ringbuffer_free(&sl->rx_buffer); |
1da177e4 | 662 | |
a75aa90c | 663 | if (buf_free < (sl->link_buf_size + |
f894165c | 664 | DVB_RINGBUFFER_PKTHDRSIZE)) { |
1da177e4 LT |
665 | status = -EAGAIN; |
666 | goto exit; | |
667 | } | |
668 | } | |
669 | ||
f894165c | 670 | if (ca->pub->read_data && |
a75aa90c | 671 | (sl->slot_state != DVB_CA_SLOTSTATE_LINKINIT)) { |
13b51648 | 672 | if (!ebuf) |
f894165c RM |
673 | status = ca->pub->read_data(ca->pub, slot, buf, |
674 | sizeof(buf)); | |
675 | else | |
676 | status = ca->pub->read_data(ca->pub, slot, buf, ecount); | |
677 | if (status < 0) | |
678 | return status; | |
679 | bytes_read = status; | |
680 | if (status == 0) | |
681 | goto exit; | |
682 | } else { | |
f894165c RM |
683 | /* check if there is data available */ |
684 | status = ca->pub->read_cam_control(ca->pub, slot, | |
685 | CTRLIF_STATUS); | |
686 | if (status < 0) | |
1da177e4 | 687 | goto exit; |
f894165c RM |
688 | if (!(status & STATUSREG_DA)) { |
689 | /* no data */ | |
690 | status = 0; | |
1da177e4 LT |
691 | goto exit; |
692 | } | |
f894165c RM |
693 | |
694 | /* read the amount of data */ | |
695 | status = ca->pub->read_cam_control(ca->pub, slot, | |
696 | CTRLIF_SIZE_HIGH); | |
697 | if (status < 0) | |
698 | goto exit; | |
699 | bytes_read = status << 8; | |
700 | status = ca->pub->read_cam_control(ca->pub, slot, | |
701 | CTRLIF_SIZE_LOW); | |
702 | if (status < 0) | |
1da177e4 | 703 | goto exit; |
f894165c RM |
704 | bytes_read |= status; |
705 | ||
706 | /* check it will fit */ | |
13b51648 | 707 | if (!ebuf) { |
a75aa90c | 708 | if (bytes_read > sl->link_buf_size) { |
f894165c RM |
709 | pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the link buffer size (%i > %i)!\n", |
710 | ca->dvbdev->adapter->num, bytes_read, | |
a75aa90c JJ |
711 | sl->link_buf_size); |
712 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
f894165c RM |
713 | status = -EIO; |
714 | goto exit; | |
715 | } | |
716 | if (bytes_read < 2) { | |
717 | pr_err("dvb_ca adapter %d: CAM sent a buffer that was less than 2 bytes!\n", | |
718 | ca->dvbdev->adapter->num); | |
a75aa90c | 719 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
f894165c RM |
720 | status = -EIO; |
721 | goto exit; | |
722 | } | |
723 | } else { | |
724 | if (bytes_read > ecount) { | |
725 | pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the ecount size!\n", | |
726 | ca->dvbdev->adapter->num); | |
727 | status = -EIO; | |
728 | goto exit; | |
729 | } | |
1da177e4 | 730 | } |
1da177e4 | 731 | |
f894165c RM |
732 | /* fill the buffer */ |
733 | for (i = 0; i < bytes_read; i++) { | |
734 | /* read byte and check */ | |
735 | status = ca->pub->read_cam_control(ca->pub, slot, | |
736 | CTRLIF_DATA); | |
737 | if (status < 0) | |
738 | goto exit; | |
1da177e4 | 739 | |
f894165c RM |
740 | /* OK, store it in the buffer */ |
741 | buf[i] = status; | |
742 | } | |
1da177e4 | 743 | |
f894165c RM |
744 | /* check for read error (RE should now be 0) */ |
745 | status = ca->pub->read_cam_control(ca->pub, slot, | |
746 | CTRLIF_STATUS); | |
747 | if (status < 0) | |
748 | goto exit; | |
749 | if (status & STATUSREG_RE) { | |
a75aa90c | 750 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
f894165c RM |
751 | status = -EIO; |
752 | goto exit; | |
753 | } | |
1da177e4 LT |
754 | } |
755 | ||
96375b7a JJ |
756 | /* |
757 | * OK, add it to the receive buffer, or copy into external buffer if | |
758 | * supplied | |
759 | */ | |
13b51648 | 760 | if (!ebuf) { |
a75aa90c | 761 | if (!sl->rx_buffer.data) { |
1da177e4 LT |
762 | status = -EIO; |
763 | goto exit; | |
764 | } | |
a75aa90c | 765 | dvb_ringbuffer_pkt_write(&sl->rx_buffer, buf, bytes_read); |
1da177e4 LT |
766 | } else { |
767 | memcpy(ebuf, buf, bytes_read); | |
768 | } | |
769 | ||
770 | dprintk("Received CA packet for slot %i connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
771 | buf[0], (buf[1] & 0x80) == 0, bytes_read); | |
772 | ||
773 | /* wake up readers when a last_fragment is received */ | |
7bd8cc8f | 774 | if ((buf[1] & 0x80) == 0x00) |
1da177e4 | 775 | wake_up_interruptible(&ca->wait_queue); |
7bd8cc8f | 776 | |
1da177e4 LT |
777 | status = bytes_read; |
778 | ||
779 | exit: | |
780 | return status; | |
781 | } | |
782 | ||
1da177e4 | 783 | /** |
fbefb1a8 MCC |
784 | * dvb_ca_en50221_write_data - This function talks to an EN50221 CAM control |
785 | * interface. It writes a buffer of data to a CAM. | |
1da177e4 | 786 | * |
fbefb1a8 MCC |
787 | * @ca: CA instance. |
788 | * @slot: Slot to write to. | |
46e42a30 MCC |
789 | * @buf: The data in this buffer is treated as a complete link-level packet to |
790 | * be written. | |
791 | * @bytes_write: Size of ebuf. | |
1da177e4 | 792 | * |
46e42a30 | 793 | * return: Number of bytes written, or < 0 on error. |
1da177e4 | 794 | */ |
8ec6107a JJ |
795 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, |
796 | u8 *buf, int bytes_write) | |
1da177e4 | 797 | { |
a75aa90c | 798 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
799 | int status; |
800 | int i; | |
801 | ||
46b4f7c1 | 802 | dprintk("%s\n", __func__); |
1da177e4 | 803 | |
d7e43844 | 804 | /* sanity check */ |
a75aa90c | 805 | if (bytes_write > sl->link_buf_size) |
1da177e4 LT |
806 | return -EINVAL; |
807 | ||
f894165c | 808 | if (ca->pub->write_data && |
a75aa90c | 809 | (sl->slot_state != DVB_CA_SLOTSTATE_LINKINIT)) |
f894165c RM |
810 | return ca->pub->write_data(ca->pub, slot, buf, bytes_write); |
811 | ||
a1ca23d1 JJ |
812 | /* |
813 | * it is possible we are dealing with a single buffer implementation, | |
814 | * thus if there is data available for read or if there is even a read | |
815 | * already in progress, we do nothing but awake the kernel thread to | |
816 | * process the data if necessary. | |
817 | */ | |
bacba9e5 JJ |
818 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
819 | if (status < 0) | |
1da177e4 LT |
820 | goto exitnowrite; |
821 | if (status & (STATUSREG_DA | STATUSREG_RE)) { | |
d7e43844 MD |
822 | if (status & STATUSREG_DA) |
823 | dvb_ca_en50221_thread_wakeup(ca); | |
824 | ||
1da177e4 LT |
825 | status = -EAGAIN; |
826 | goto exitnowrite; | |
827 | } | |
828 | ||
829 | /* OK, set HC bit */ | |
bacba9e5 JJ |
830 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, |
831 | IRQEN | CMDREG_HC); | |
832 | if (status) | |
1da177e4 LT |
833 | goto exit; |
834 | ||
835 | /* check if interface is still free */ | |
bacba9e5 JJ |
836 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
837 | if (status < 0) | |
1da177e4 LT |
838 | goto exit; |
839 | if (!(status & STATUSREG_FR)) { | |
840 | /* it wasn't free => try again later */ | |
841 | status = -EAGAIN; | |
842 | goto exit; | |
843 | } | |
844 | ||
e7080d44 J |
845 | /* |
846 | * It may need some time for the CAM to settle down, or there might | |
847 | * be a race condition between the CAM, writing HC and our last | |
848 | * check for DA. This happens, if the CAM asserts DA, just after | |
849 | * checking DA before we are setting HC. In this case it might be | |
850 | * a bug in the CAM to keep the FR bit, the lower layer/HW | |
851 | * communication requires a longer timeout or the CAM needs more | |
852 | * time internally. But this happens in reality! | |
853 | * We need to read the status from the HW again and do the same | |
854 | * we did for the previous check for DA | |
855 | */ | |
856 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); | |
857 | if (status < 0) | |
858 | goto exit; | |
859 | ||
860 | if (status & (STATUSREG_DA | STATUSREG_RE)) { | |
861 | if (status & STATUSREG_DA) | |
862 | dvb_ca_en50221_thread_wakeup(ca); | |
863 | ||
864 | status = -EAGAIN; | |
865 | goto exit; | |
866 | } | |
867 | ||
1da177e4 | 868 | /* send the amount of data */ |
bacba9e5 JJ |
869 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH, |
870 | bytes_write >> 8); | |
871 | if (status) | |
1da177e4 | 872 | goto exit; |
bacba9e5 JJ |
873 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW, |
874 | bytes_write & 0xff); | |
875 | if (status) | |
1da177e4 LT |
876 | goto exit; |
877 | ||
878 | /* send the buffer */ | |
879 | for (i = 0; i < bytes_write; i++) { | |
bacba9e5 JJ |
880 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_DATA, |
881 | buf[i]); | |
882 | if (status) | |
1da177e4 LT |
883 | goto exit; |
884 | } | |
885 | ||
886 | /* check for write error (WE should now be 0) */ | |
bacba9e5 JJ |
887 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
888 | if (status < 0) | |
1da177e4 LT |
889 | goto exit; |
890 | if (status & STATUSREG_WE) { | |
a75aa90c | 891 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
1da177e4 LT |
892 | status = -EIO; |
893 | goto exit; | |
894 | } | |
895 | status = bytes_write; | |
896 | ||
897 | dprintk("Wrote CA packet for slot %i, connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
898 | buf[0], (buf[1] & 0x80) == 0, bytes_write); | |
899 | ||
900 | exit: | |
901 | ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); | |
902 | ||
903 | exitnowrite: | |
904 | return status; | |
905 | } | |
1da177e4 | 906 | |
96375b7a | 907 | /* ************************************************************************** */ |
1da177e4 LT |
908 | /* EN50221 higher level functions */ |
909 | ||
1da177e4 | 910 | /** |
97adc2b3 | 911 | * dvb_ca_en50221_slot_shutdown - A CAM has been removed => shut it down. |
1da177e4 | 912 | * |
fbefb1a8 MCC |
913 | * @ca: CA instance. |
914 | * @slot: Slot to shut down. | |
1da177e4 LT |
915 | */ |
916 | static int dvb_ca_en50221_slot_shutdown(struct dvb_ca_private *ca, int slot) | |
917 | { | |
46b4f7c1 | 918 | dprintk("%s\n", __func__); |
1da177e4 | 919 | |
1da177e4 LT |
920 | ca->pub->slot_shutdown(ca->pub, slot); |
921 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1da177e4 | 922 | |
a1ca23d1 JJ |
923 | /* |
924 | * need to wake up all processes to check if they're now trying to | |
925 | * write to a defunct CAM | |
926 | */ | |
1da177e4 LT |
927 | wake_up_interruptible(&ca->wait_queue); |
928 | ||
929 | dprintk("Slot %i shutdown\n", slot); | |
930 | ||
931 | /* success */ | |
932 | return 0; | |
933 | } | |
1da177e4 | 934 | |
1da177e4 | 935 | /** |
97adc2b3 | 936 | * dvb_ca_en50221_camchange_irq - A CAMCHANGE IRQ has occurred. |
1da177e4 | 937 | * |
46e42a30 | 938 | * @pubca: CA instance. |
fbefb1a8 MCC |
939 | * @slot: Slot concerned. |
940 | * @change_type: One of the DVB_CA_CAMCHANGE_* values. | |
1da177e4 | 941 | */ |
96375b7a JJ |
942 | void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot, |
943 | int change_type) | |
1da177e4 | 944 | { |
0c53c70f | 945 | struct dvb_ca_private *ca = pubca->private; |
a75aa90c | 946 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
947 | |
948 | dprintk("CAMCHANGE IRQ slot:%i change_type:%i\n", slot, change_type); | |
949 | ||
950 | switch (change_type) { | |
951 | case DVB_CA_EN50221_CAMCHANGE_REMOVED: | |
952 | case DVB_CA_EN50221_CAMCHANGE_INSERTED: | |
953 | break; | |
954 | ||
955 | default: | |
956 | return; | |
957 | } | |
958 | ||
a75aa90c JJ |
959 | sl->camchange_type = change_type; |
960 | atomic_inc(&sl->camchange_count); | |
1da177e4 LT |
961 | dvb_ca_en50221_thread_wakeup(ca); |
962 | } | |
97adc2b3 | 963 | EXPORT_SYMBOL(dvb_ca_en50221_camchange_irq); |
1da177e4 | 964 | |
1da177e4 | 965 | /** |
fbefb1a8 | 966 | * dvb_ca_en50221_camready_irq - A CAMREADY IRQ has occurred. |
1da177e4 | 967 | * |
46e42a30 | 968 | * @pubca: CA instance. |
fbefb1a8 | 969 | * @slot: Slot concerned. |
1da177e4 LT |
970 | */ |
971 | void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221 *pubca, int slot) | |
972 | { | |
0c53c70f | 973 | struct dvb_ca_private *ca = pubca->private; |
a75aa90c | 974 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
975 | |
976 | dprintk("CAMREADY IRQ slot:%i\n", slot); | |
977 | ||
a75aa90c JJ |
978 | if (sl->slot_state == DVB_CA_SLOTSTATE_WAITREADY) { |
979 | sl->slot_state = DVB_CA_SLOTSTATE_VALIDATE; | |
1da177e4 LT |
980 | dvb_ca_en50221_thread_wakeup(ca); |
981 | } | |
982 | } | |
97adc2b3 | 983 | EXPORT_SYMBOL(dvb_ca_en50221_camready_irq); |
1da177e4 | 984 | |
1da177e4 | 985 | /** |
97adc2b3 | 986 | * dvb_ca_en50221_frda_irq - An FR or DA IRQ has occurred. |
1da177e4 | 987 | * |
46e42a30 | 988 | * @pubca: CA instance. |
fbefb1a8 | 989 | * @slot: Slot concerned. |
1da177e4 LT |
990 | */ |
991 | void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *pubca, int slot) | |
992 | { | |
0c53c70f | 993 | struct dvb_ca_private *ca = pubca->private; |
a75aa90c | 994 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
995 | int flags; |
996 | ||
997 | dprintk("FR/DA IRQ slot:%i\n", slot); | |
998 | ||
a75aa90c | 999 | switch (sl->slot_state) { |
1da177e4 LT |
1000 | case DVB_CA_SLOTSTATE_LINKINIT: |
1001 | flags = ca->pub->read_cam_control(pubca, slot, CTRLIF_STATUS); | |
1002 | if (flags & STATUSREG_DA) { | |
1003 | dprintk("CAM supports DA IRQ\n"); | |
a75aa90c | 1004 | sl->da_irq_supported = 1; |
1da177e4 LT |
1005 | } |
1006 | break; | |
1007 | ||
1008 | case DVB_CA_SLOTSTATE_RUNNING: | |
1009 | if (ca->open) | |
ded92846 | 1010 | dvb_ca_en50221_thread_wakeup(ca); |
1da177e4 LT |
1011 | break; |
1012 | } | |
1013 | } | |
97adc2b3 | 1014 | EXPORT_SYMBOL(dvb_ca_en50221_frda_irq); |
1da177e4 | 1015 | |
96375b7a | 1016 | /* ************************************************************************** */ |
1da177e4 LT |
1017 | /* EN50221 thread functions */ |
1018 | ||
1019 | /** | |
1020 | * Wake up the DVB CA thread | |
1021 | * | |
fbefb1a8 | 1022 | * @ca: CA instance. |
1da177e4 LT |
1023 | */ |
1024 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca) | |
1025 | { | |
46b4f7c1 | 1026 | dprintk("%s\n", __func__); |
1da177e4 LT |
1027 | |
1028 | ca->wakeup = 1; | |
1029 | mb(); | |
9320874a | 1030 | wake_up_process(ca->thread); |
1da177e4 LT |
1031 | } |
1032 | ||
1da177e4 LT |
1033 | /** |
1034 | * Update the delay used by the thread. | |
1035 | * | |
fbefb1a8 | 1036 | * @ca: CA instance. |
1da177e4 LT |
1037 | */ |
1038 | static void dvb_ca_en50221_thread_update_delay(struct dvb_ca_private *ca) | |
1039 | { | |
1040 | int delay; | |
1041 | int curdelay = 100000000; | |
1042 | int slot; | |
1043 | ||
dc32f324 JJ |
1044 | /* |
1045 | * Beware of too high polling frequency, because one polling | |
71a35fe2 RS |
1046 | * call might take several hundred milliseconds until timeout! |
1047 | */ | |
1da177e4 | 1048 | for (slot = 0; slot < ca->slot_count; slot++) { |
a75aa90c JJ |
1049 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1050 | ||
1051 | switch (sl->slot_state) { | |
1da177e4 LT |
1052 | default: |
1053 | case DVB_CA_SLOTSTATE_NONE: | |
71a35fe2 RS |
1054 | delay = HZ * 60; /* 60s */ |
1055 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
1056 | delay = HZ * 5; /* 5s */ | |
1057 | break; | |
1da177e4 | 1058 | case DVB_CA_SLOTSTATE_INVALID: |
71a35fe2 RS |
1059 | delay = HZ * 60; /* 60s */ |
1060 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
1061 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
1062 | break; |
1063 | ||
1064 | case DVB_CA_SLOTSTATE_UNINITIALISED: | |
1065 | case DVB_CA_SLOTSTATE_WAITREADY: | |
1066 | case DVB_CA_SLOTSTATE_VALIDATE: | |
1067 | case DVB_CA_SLOTSTATE_WAITFR: | |
1068 | case DVB_CA_SLOTSTATE_LINKINIT: | |
71a35fe2 | 1069 | delay = HZ / 10; /* 100ms */ |
1da177e4 LT |
1070 | break; |
1071 | ||
1072 | case DVB_CA_SLOTSTATE_RUNNING: | |
71a35fe2 RS |
1073 | delay = HZ * 60; /* 60s */ |
1074 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
1075 | delay = HZ / 10; /* 100ms */ | |
1da177e4 | 1076 | if (ca->open) { |
a75aa90c | 1077 | if ((!sl->da_irq_supported) || |
71a35fe2 RS |
1078 | (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_DA))) |
1079 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
1080 | } |
1081 | break; | |
1082 | } | |
1083 | ||
1084 | if (delay < curdelay) | |
1085 | curdelay = delay; | |
1086 | } | |
1087 | ||
1088 | ca->delay = curdelay; | |
1089 | } | |
1090 | ||
5d023252 JJ |
1091 | /** |
1092 | * Poll if the CAM is gone. | |
1093 | * | |
1094 | * @ca: CA instance. | |
1095 | * @slot: Slot to process. | |
46e42a30 | 1096 | * return:: 0 .. no change |
5d023252 JJ |
1097 | * 1 .. CAM state changed |
1098 | */ | |
1099 | ||
1100 | static int dvb_ca_en50221_poll_cam_gone(struct dvb_ca_private *ca, int slot) | |
1101 | { | |
1102 | int changed = 0; | |
1103 | int status; | |
1104 | ||
1105 | /* | |
1106 | * we need this extra check for annoying interfaces like the | |
1107 | * budget-av | |
1108 | */ | |
1109 | if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && | |
1110 | (ca->pub->poll_slot_status)) { | |
1111 | status = ca->pub->poll_slot_status(ca->pub, slot, 0); | |
1112 | if (!(status & | |
1113 | DVB_CA_EN50221_POLL_CAM_PRESENT)) { | |
1114 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1115 | dvb_ca_en50221_thread_update_delay(ca); | |
1116 | changed = 1; | |
1117 | } | |
1118 | } | |
1119 | return changed; | |
1120 | } | |
1121 | ||
1da177e4 | 1122 | /** |
a004b70e JJ |
1123 | * Thread state machine for one CA slot to perform the data transfer. |
1124 | * | |
1125 | * @ca: CA instance. | |
1126 | * @slot: Slot to process. | |
1da177e4 | 1127 | */ |
a004b70e JJ |
1128 | static void dvb_ca_en50221_thread_state_machine(struct dvb_ca_private *ca, |
1129 | int slot) | |
1da177e4 | 1130 | { |
a004b70e | 1131 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 | 1132 | int flags; |
1da177e4 LT |
1133 | int pktcount; |
1134 | void *rxbuf; | |
1135 | ||
a004b70e | 1136 | mutex_lock(&sl->slot_lock); |
1da177e4 | 1137 | |
a004b70e JJ |
1138 | /* check the cam status + deal with CAMCHANGEs */ |
1139 | while (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1140 | /* clear down an old CI slot if necessary */ | |
1141 | if (sl->slot_state != DVB_CA_SLOTSTATE_NONE) | |
1142 | dvb_ca_en50221_slot_shutdown(ca, slot); | |
1da177e4 | 1143 | |
a004b70e JJ |
1144 | /* if a CAM is NOW present, initialise it */ |
1145 | if (sl->camchange_type == DVB_CA_EN50221_CAMCHANGE_INSERTED) | |
1146 | sl->slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; | |
1da177e4 | 1147 | |
a004b70e JJ |
1148 | /* we've handled one CAMCHANGE */ |
1149 | dvb_ca_en50221_thread_update_delay(ca); | |
1150 | atomic_dec(&sl->camchange_count); | |
1151 | } | |
1da177e4 | 1152 | |
a004b70e JJ |
1153 | /* CAM state machine */ |
1154 | switch (sl->slot_state) { | |
1155 | case DVB_CA_SLOTSTATE_NONE: | |
1156 | case DVB_CA_SLOTSTATE_INVALID: | |
1157 | /* no action needed */ | |
1158 | break; | |
1da177e4 | 1159 | |
a004b70e JJ |
1160 | case DVB_CA_SLOTSTATE_UNINITIALISED: |
1161 | sl->slot_state = DVB_CA_SLOTSTATE_WAITREADY; | |
1162 | ca->pub->slot_reset(ca->pub, slot); | |
1163 | sl->timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); | |
1164 | break; | |
1da177e4 | 1165 | |
a004b70e JJ |
1166 | case DVB_CA_SLOTSTATE_WAITREADY: |
1167 | if (time_after(jiffies, sl->timeout)) { | |
1168 | pr_err("dvb_ca adaptor %d: PC card did not respond :(\n", | |
1169 | ca->dvbdev->adapter->num); | |
1170 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1171 | dvb_ca_en50221_thread_update_delay(ca); | |
1172 | break; | |
1173 | } | |
1174 | /* | |
1175 | * no other action needed; will automatically change state when | |
1176 | * ready | |
1177 | */ | |
1178 | break; | |
1da177e4 | 1179 | |
a004b70e JJ |
1180 | case DVB_CA_SLOTSTATE_VALIDATE: |
1181 | if (dvb_ca_en50221_parse_attributes(ca, slot) != 0) { | |
5d023252 JJ |
1182 | if (dvb_ca_en50221_poll_cam_gone(ca, slot)) |
1183 | break; | |
1da177e4 | 1184 | |
a004b70e JJ |
1185 | pr_err("dvb_ca adapter %d: Invalid PC card inserted :(\n", |
1186 | ca->dvbdev->adapter->num); | |
1187 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1188 | dvb_ca_en50221_thread_update_delay(ca); | |
1189 | break; | |
1190 | } | |
1191 | if (dvb_ca_en50221_set_configoption(ca, slot) != 0) { | |
1192 | pr_err("dvb_ca adapter %d: Unable to initialise CAM :(\n", | |
1193 | ca->dvbdev->adapter->num); | |
1194 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1195 | dvb_ca_en50221_thread_update_delay(ca); | |
1196 | break; | |
1197 | } | |
1198 | if (ca->pub->write_cam_control(ca->pub, slot, | |
1199 | CTRLIF_COMMAND, | |
1200 | CMDREG_RS) != 0) { | |
1201 | pr_err("dvb_ca adapter %d: Unable to reset CAM IF\n", | |
1202 | ca->dvbdev->adapter->num); | |
1203 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1204 | dvb_ca_en50221_thread_update_delay(ca); | |
1205 | break; | |
1206 | } | |
1207 | dprintk("DVB CAM validated successfully\n"); | |
1da177e4 | 1208 | |
a004b70e JJ |
1209 | sl->timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); |
1210 | sl->slot_state = DVB_CA_SLOTSTATE_WAITFR; | |
1211 | ca->wakeup = 1; | |
1212 | break; | |
1da177e4 | 1213 | |
a004b70e JJ |
1214 | case DVB_CA_SLOTSTATE_WAITFR: |
1215 | if (time_after(jiffies, sl->timeout)) { | |
1216 | pr_err("dvb_ca adapter %d: DVB CAM did not respond :(\n", | |
1217 | ca->dvbdev->adapter->num); | |
1218 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1219 | dvb_ca_en50221_thread_update_delay(ca); | |
1220 | break; | |
1221 | } | |
1da177e4 | 1222 | |
a004b70e JJ |
1223 | flags = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
1224 | if (flags & STATUSREG_FR) { | |
1225 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
1226 | ca->wakeup = 1; | |
1227 | } | |
1228 | break; | |
1da177e4 | 1229 | |
a004b70e JJ |
1230 | case DVB_CA_SLOTSTATE_LINKINIT: |
1231 | if (dvb_ca_en50221_link_init(ca, slot) != 0) { | |
5d023252 JJ |
1232 | if (dvb_ca_en50221_poll_cam_gone(ca, slot)) |
1233 | break; | |
1da177e4 | 1234 | |
a004b70e JJ |
1235 | pr_err("dvb_ca adapter %d: DVB CAM link initialisation failed :(\n", |
1236 | ca->dvbdev->adapter->num); | |
1237 | sl->slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; | |
1238 | dvb_ca_en50221_thread_update_delay(ca); | |
1239 | break; | |
1240 | } | |
1da177e4 | 1241 | |
a004b70e JJ |
1242 | if (!sl->rx_buffer.data) { |
1243 | rxbuf = vmalloc(RX_BUFFER_SIZE); | |
1244 | if (!rxbuf) { | |
1245 | pr_err("dvb_ca adapter %d: Unable to allocate CAM rx buffer :(\n", | |
b3ad24d2 | 1246 | ca->dvbdev->adapter->num); |
a004b70e JJ |
1247 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; |
1248 | dvb_ca_en50221_thread_update_delay(ca); | |
1da177e4 | 1249 | break; |
a004b70e JJ |
1250 | } |
1251 | dvb_ringbuffer_init(&sl->rx_buffer, rxbuf, | |
1252 | RX_BUFFER_SIZE); | |
1253 | } | |
1da177e4 | 1254 | |
a004b70e JJ |
1255 | ca->pub->slot_ts_enable(ca->pub, slot); |
1256 | sl->slot_state = DVB_CA_SLOTSTATE_RUNNING; | |
1257 | dvb_ca_en50221_thread_update_delay(ca); | |
1258 | pr_err("dvb_ca adapter %d: DVB CAM detected and initialised successfully\n", | |
1259 | ca->dvbdev->adapter->num); | |
1260 | break; | |
1da177e4 | 1261 | |
a004b70e JJ |
1262 | case DVB_CA_SLOTSTATE_RUNNING: |
1263 | if (!ca->open) | |
1264 | break; | |
1265 | ||
1266 | /* poll slots for data */ | |
1267 | pktcount = 0; | |
1268 | while (dvb_ca_en50221_read_data(ca, slot, NULL, 0) > 0) { | |
1269 | if (!ca->open) | |
1270 | break; | |
1271 | ||
1272 | /* | |
1273 | * if a CAMCHANGE occurred at some point, do not do any | |
1274 | * more processing of this slot | |
1275 | */ | |
1276 | if (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1277 | /* | |
4ecb4bfc | 1278 | * we don't want to sleep on the next iteration |
a004b70e JJ |
1279 | * so we can handle the cam change |
1280 | */ | |
1281 | ca->wakeup = 1; | |
1da177e4 LT |
1282 | break; |
1283 | } | |
d7e43844 | 1284 | |
a004b70e JJ |
1285 | /* check if we've hit our limit this time */ |
1286 | if (++pktcount >= MAX_RX_PACKETS_PER_ITERATION) { | |
1287 | /* | |
4ecb4bfc | 1288 | * don't sleep; there is likely to be more data |
a004b70e JJ |
1289 | * to read |
1290 | */ | |
1291 | ca->wakeup = 1; | |
1292 | break; | |
1293 | } | |
1da177e4 | 1294 | } |
a004b70e JJ |
1295 | break; |
1296 | } | |
1297 | ||
1298 | mutex_unlock(&sl->slot_lock); | |
1299 | } | |
1300 | ||
46e42a30 | 1301 | /* |
a004b70e JJ |
1302 | * Kernel thread which monitors CA slots for CAM changes, and performs data |
1303 | * transfers. | |
1304 | */ | |
1305 | static int dvb_ca_en50221_thread(void *data) | |
1306 | { | |
1307 | struct dvb_ca_private *ca = data; | |
1308 | int slot; | |
1309 | ||
1310 | dprintk("%s\n", __func__); | |
1311 | ||
1312 | /* choose the correct initial delay */ | |
1313 | dvb_ca_en50221_thread_update_delay(ca); | |
1314 | ||
1315 | /* main loop */ | |
1316 | while (!kthread_should_stop()) { | |
1317 | /* sleep for a bit */ | |
1318 | if (!ca->wakeup) { | |
1319 | set_current_state(TASK_INTERRUPTIBLE); | |
1320 | schedule_timeout(ca->delay); | |
1321 | if (kthread_should_stop()) | |
1322 | return 0; | |
1323 | } | |
1324 | ca->wakeup = 0; | |
1325 | ||
1326 | /* go through all the slots processing them */ | |
1327 | for (slot = 0; slot < ca->slot_count; slot++) | |
1328 | dvb_ca_en50221_thread_state_machine(ca, slot); | |
1da177e4 LT |
1329 | } |
1330 | ||
1da177e4 LT |
1331 | return 0; |
1332 | } | |
1333 | ||
96375b7a | 1334 | /* ************************************************************************** */ |
1da177e4 LT |
1335 | /* EN50221 IO interface functions */ |
1336 | ||
1337 | /** | |
1338 | * Real ioctl implementation. | |
1339 | * NOTE: CA_SEND_MSG/CA_GET_MSG ioctls have userspace buffers passed to them. | |
1340 | * | |
fbefb1a8 MCC |
1341 | * @file: File concerned. |
1342 | * @cmd: IOCTL command. | |
46e42a30 | 1343 | * @parg: Associated argument. |
1da177e4 | 1344 | * |
46e42a30 | 1345 | * return: 0 on success, <0 on error. |
1da177e4 | 1346 | */ |
16ef8def | 1347 | static int dvb_ca_en50221_io_do_ioctl(struct file *file, |
1da177e4 LT |
1348 | unsigned int cmd, void *parg) |
1349 | { | |
0c53c70f JS |
1350 | struct dvb_device *dvbdev = file->private_data; |
1351 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1352 | int err = 0; |
1353 | int slot; | |
1354 | ||
46b4f7c1 | 1355 | dprintk("%s\n", __func__); |
1da177e4 | 1356 | |
30ad64b8 NS |
1357 | if (mutex_lock_interruptible(&ca->ioctl_mutex)) |
1358 | return -ERESTARTSYS; | |
1359 | ||
1da177e4 LT |
1360 | switch (cmd) { |
1361 | case CA_RESET: | |
1362 | for (slot = 0; slot < ca->slot_count; slot++) { | |
a75aa90c JJ |
1363 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1364 | ||
1365 | mutex_lock(&sl->slot_lock); | |
1366 | if (sl->slot_state != DVB_CA_SLOTSTATE_NONE) { | |
1da177e4 LT |
1367 | dvb_ca_en50221_slot_shutdown(ca, slot); |
1368 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) | |
1369 | dvb_ca_en50221_camchange_irq(ca->pub, | |
1370 | slot, | |
1371 | DVB_CA_EN50221_CAMCHANGE_INSERTED); | |
1372 | } | |
a75aa90c | 1373 | mutex_unlock(&sl->slot_lock); |
1da177e4 LT |
1374 | } |
1375 | ca->next_read_slot = 0; | |
1376 | dvb_ca_en50221_thread_wakeup(ca); | |
1377 | break; | |
1378 | ||
1379 | case CA_GET_CAP: { | |
0c53c70f | 1380 | struct ca_caps *caps = parg; |
1da177e4 LT |
1381 | |
1382 | caps->slot_num = ca->slot_count; | |
1383 | caps->slot_type = CA_CI_LINK; | |
1384 | caps->descr_num = 0; | |
1385 | caps->descr_type = 0; | |
1386 | break; | |
1387 | } | |
1388 | ||
1389 | case CA_GET_SLOT_INFO: { | |
0c53c70f | 1390 | struct ca_slot_info *info = parg; |
a75aa90c | 1391 | struct dvb_ca_slot *sl; |
1da177e4 | 1392 | |
a75aa90c JJ |
1393 | slot = info->num; |
1394 | if ((slot > ca->slot_count) || (slot < 0)) { | |
c4fe29a3 DC |
1395 | err = -EINVAL; |
1396 | goto out_unlock; | |
1397 | } | |
1da177e4 LT |
1398 | |
1399 | info->type = CA_CI_LINK; | |
1400 | info->flags = 0; | |
a75aa90c JJ |
1401 | sl = &ca->slot_info[slot]; |
1402 | if ((sl->slot_state != DVB_CA_SLOTSTATE_NONE) && | |
1403 | (sl->slot_state != DVB_CA_SLOTSTATE_INVALID)) { | |
1da177e4 LT |
1404 | info->flags = CA_CI_MODULE_PRESENT; |
1405 | } | |
a75aa90c | 1406 | if (sl->slot_state == DVB_CA_SLOTSTATE_RUNNING) |
1da177e4 | 1407 | info->flags |= CA_CI_MODULE_READY; |
1da177e4 LT |
1408 | break; |
1409 | } | |
1410 | ||
1411 | default: | |
1412 | err = -EINVAL; | |
1413 | break; | |
1414 | } | |
1415 | ||
c4fe29a3 | 1416 | out_unlock: |
30ad64b8 | 1417 | mutex_unlock(&ca->ioctl_mutex); |
1da177e4 LT |
1418 | return err; |
1419 | } | |
1420 | ||
1da177e4 LT |
1421 | /** |
1422 | * Wrapper for ioctl implementation. | |
1423 | * | |
fbefb1a8 MCC |
1424 | * @file: File concerned. |
1425 | * @cmd: IOCTL command. | |
1426 | * @arg: Associated argument. | |
1da177e4 | 1427 | * |
46e42a30 | 1428 | * return: 0 on success, <0 on error. |
1da177e4 | 1429 | */ |
16ef8def AB |
1430 | static long dvb_ca_en50221_io_ioctl(struct file *file, |
1431 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1432 | { |
72024f1e | 1433 | return dvb_usercopy(file, cmd, arg, dvb_ca_en50221_io_do_ioctl); |
1da177e4 LT |
1434 | } |
1435 | ||
1da177e4 LT |
1436 | /** |
1437 | * Implementation of write() syscall. | |
1438 | * | |
fbefb1a8 MCC |
1439 | * @file: File structure. |
1440 | * @buf: Source buffer. | |
1441 | * @count: Size of source buffer. | |
1442 | * @ppos: Position in file (ignored). | |
1da177e4 | 1443 | * |
46e42a30 | 1444 | * return: Number of bytes read, or <0 on error. |
1da177e4 LT |
1445 | */ |
1446 | static ssize_t dvb_ca_en50221_io_write(struct file *file, | |
8ec6107a JJ |
1447 | const char __user *buf, size_t count, |
1448 | loff_t *ppos) | |
1da177e4 | 1449 | { |
0c53c70f JS |
1450 | struct dvb_device *dvbdev = file->private_data; |
1451 | struct dvb_ca_private *ca = dvbdev->priv; | |
a75aa90c | 1452 | struct dvb_ca_slot *sl; |
1da177e4 LT |
1453 | u8 slot, connection_id; |
1454 | int status; | |
260f8d7c | 1455 | u8 fragbuf[HOST_LINK_BUF_SIZE]; |
1da177e4 LT |
1456 | int fragpos = 0; |
1457 | int fraglen; | |
1458 | unsigned long timeout; | |
1459 | int written; | |
1460 | ||
46b4f7c1 | 1461 | dprintk("%s\n", __func__); |
1da177e4 | 1462 | |
96375b7a JJ |
1463 | /* |
1464 | * Incoming packet has a 2 byte header. | |
1465 | * hdr[0] = slot_id, hdr[1] = connection_id | |
1466 | */ | |
1da177e4 LT |
1467 | if (count < 2) |
1468 | return -EINVAL; | |
1469 | ||
1470 | /* extract slot & connection id */ | |
1471 | if (copy_from_user(&slot, buf, 1)) | |
1472 | return -EFAULT; | |
1473 | if (copy_from_user(&connection_id, buf + 1, 1)) | |
1474 | return -EFAULT; | |
1475 | buf += 2; | |
1476 | count -= 2; | |
fd1daf2e MCC |
1477 | |
1478 | if (slot >= ca->slot_count) | |
1479 | return -EINVAL; | |
1480 | slot = array_index_nospec(slot, ca->slot_count); | |
a75aa90c | 1481 | sl = &ca->slot_info[slot]; |
1da177e4 LT |
1482 | |
1483 | /* check if the slot is actually running */ | |
a75aa90c | 1484 | if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) |
1da177e4 LT |
1485 | return -EINVAL; |
1486 | ||
1487 | /* fragment the packets & store in the buffer */ | |
1488 | while (fragpos < count) { | |
a75aa90c | 1489 | fraglen = sl->link_buf_size - 2; |
624f0c18 MCC |
1490 | if (fraglen < 0) |
1491 | break; | |
1492 | if (fraglen > HOST_LINK_BUF_SIZE - 2) | |
1493 | fraglen = HOST_LINK_BUF_SIZE - 2; | |
1da177e4 LT |
1494 | if ((count - fragpos) < fraglen) |
1495 | fraglen = count - fragpos; | |
1496 | ||
1497 | fragbuf[0] = connection_id; | |
1498 | fragbuf[1] = ((fragpos + fraglen) < count) ? 0x80 : 0x00; | |
e252984c DC |
1499 | status = copy_from_user(fragbuf + 2, buf + fragpos, fraglen); |
1500 | if (status) { | |
1501 | status = -EFAULT; | |
1da177e4 | 1502 | goto exit; |
e252984c | 1503 | } |
1da177e4 LT |
1504 | |
1505 | timeout = jiffies + HZ / 2; | |
1506 | written = 0; | |
1507 | while (!time_after(jiffies, timeout)) { | |
96375b7a JJ |
1508 | /* |
1509 | * check the CAM hasn't been removed/reset in the | |
1510 | * meantime | |
1511 | */ | |
a75aa90c | 1512 | if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) { |
1da177e4 LT |
1513 | status = -EIO; |
1514 | goto exit; | |
1515 | } | |
1516 | ||
a75aa90c | 1517 | mutex_lock(&sl->slot_lock); |
96375b7a JJ |
1518 | status = dvb_ca_en50221_write_data(ca, slot, fragbuf, |
1519 | fraglen + 2); | |
a75aa90c | 1520 | mutex_unlock(&sl->slot_lock); |
1da177e4 LT |
1521 | if (status == (fraglen + 2)) { |
1522 | written = 1; | |
1523 | break; | |
1524 | } | |
1525 | if (status != -EAGAIN) | |
1526 | goto exit; | |
1527 | ||
b9af29e1 | 1528 | usleep_range(1000, 1100); |
1da177e4 LT |
1529 | } |
1530 | if (!written) { | |
1531 | status = -EIO; | |
1532 | goto exit; | |
1533 | } | |
1534 | ||
1535 | fragpos += fraglen; | |
1536 | } | |
1537 | status = count + 2; | |
1538 | ||
1539 | exit: | |
1540 | return status; | |
1541 | } | |
1542 | ||
46e42a30 | 1543 | /* |
1da177e4 LT |
1544 | * Condition for waking up in dvb_ca_en50221_io_read_condition |
1545 | */ | |
ded92846 AQ |
1546 | static int dvb_ca_en50221_io_read_condition(struct dvb_ca_private *ca, |
1547 | int *result, int *_slot) | |
1da177e4 LT |
1548 | { |
1549 | int slot; | |
1550 | int slot_count = 0; | |
1551 | int idx; | |
ded92846 | 1552 | size_t fraglen; |
1da177e4 LT |
1553 | int connection_id = -1; |
1554 | int found = 0; | |
1555 | u8 hdr[2]; | |
1556 | ||
1557 | slot = ca->next_read_slot; | |
1558 | while ((slot_count < ca->slot_count) && (!found)) { | |
a75aa90c JJ |
1559 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1560 | ||
1561 | if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) | |
1da177e4 LT |
1562 | goto nextslot; |
1563 | ||
a75aa90c | 1564 | if (!sl->rx_buffer.data) |
1da177e4 | 1565 | return 0; |
1da177e4 | 1566 | |
a75aa90c | 1567 | idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, -1, &fraglen); |
1da177e4 | 1568 | while (idx != -1) { |
a75aa90c | 1569 | dvb_ringbuffer_pkt_read(&sl->rx_buffer, idx, 0, hdr, 2); |
1da177e4 LT |
1570 | if (connection_id == -1) |
1571 | connection_id = hdr[0]; | |
96375b7a JJ |
1572 | if ((hdr[0] == connection_id) && |
1573 | ((hdr[1] & 0x80) == 0)) { | |
1da177e4 LT |
1574 | *_slot = slot; |
1575 | found = 1; | |
1576 | break; | |
1577 | } | |
1578 | ||
a75aa90c JJ |
1579 | idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, idx, |
1580 | &fraglen); | |
1da177e4 LT |
1581 | } |
1582 | ||
ded92846 | 1583 | nextslot: |
1da177e4 LT |
1584 | slot = (slot + 1) % ca->slot_count; |
1585 | slot_count++; | |
1586 | } | |
1587 | ||
1588 | ca->next_read_slot = slot; | |
1589 | return found; | |
1590 | } | |
1591 | ||
1da177e4 LT |
1592 | /** |
1593 | * Implementation of read() syscall. | |
1594 | * | |
fbefb1a8 MCC |
1595 | * @file: File structure. |
1596 | * @buf: Destination buffer. | |
1597 | * @count: Size of destination buffer. | |
1598 | * @ppos: Position in file (ignored). | |
1da177e4 | 1599 | * |
46e42a30 | 1600 | * return: Number of bytes read, or <0 on error. |
1da177e4 | 1601 | */ |
8ec6107a JJ |
1602 | static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user *buf, |
1603 | size_t count, loff_t *ppos) | |
1da177e4 | 1604 | { |
0c53c70f JS |
1605 | struct dvb_device *dvbdev = file->private_data; |
1606 | struct dvb_ca_private *ca = dvbdev->priv; | |
a75aa90c | 1607 | struct dvb_ca_slot *sl; |
1da177e4 LT |
1608 | int status; |
1609 | int result = 0; | |
1610 | u8 hdr[2]; | |
1611 | int slot; | |
1612 | int connection_id = -1; | |
1613 | size_t idx, idx2; | |
1614 | int last_fragment = 0; | |
1615 | size_t fraglen; | |
1616 | int pktlen; | |
1617 | int dispose = 0; | |
1618 | ||
46b4f7c1 | 1619 | dprintk("%s\n", __func__); |
1da177e4 | 1620 | |
96375b7a JJ |
1621 | /* |
1622 | * Outgoing packet has a 2 byte header. | |
1623 | * hdr[0] = slot_id, hdr[1] = connection_id | |
1624 | */ | |
1da177e4 LT |
1625 | if (count < 2) |
1626 | return -EINVAL; | |
1627 | ||
1628 | /* wait for some data */ | |
bacba9e5 JJ |
1629 | status = dvb_ca_en50221_io_read_condition(ca, &result, &slot); |
1630 | if (status == 0) { | |
1da177e4 LT |
1631 | /* if we're in nonblocking mode, exit immediately */ |
1632 | if (file->f_flags & O_NONBLOCK) | |
1633 | return -EWOULDBLOCK; | |
1634 | ||
1635 | /* wait for some data */ | |
1636 | status = wait_event_interruptible(ca->wait_queue, | |
1637 | dvb_ca_en50221_io_read_condition | |
1638 | (ca, &result, &slot)); | |
1639 | } | |
1640 | if ((status < 0) || (result < 0)) { | |
1641 | if (result) | |
1642 | return result; | |
1643 | return status; | |
1644 | } | |
1645 | ||
a75aa90c JJ |
1646 | sl = &ca->slot_info[slot]; |
1647 | idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, -1, &fraglen); | |
1da177e4 LT |
1648 | pktlen = 2; |
1649 | do { | |
1650 | if (idx == -1) { | |
b3ad24d2 MCC |
1651 | pr_err("dvb_ca adapter %d: BUG: read packet ended before last_fragment encountered\n", |
1652 | ca->dvbdev->adapter->num); | |
1da177e4 LT |
1653 | status = -EIO; |
1654 | goto exit; | |
1655 | } | |
1656 | ||
a75aa90c | 1657 | dvb_ringbuffer_pkt_read(&sl->rx_buffer, idx, 0, hdr, 2); |
1da177e4 LT |
1658 | if (connection_id == -1) |
1659 | connection_id = hdr[0]; | |
1660 | if (hdr[0] == connection_id) { | |
1661 | if (pktlen < count) { | |
7bd8cc8f | 1662 | if ((pktlen + fraglen - 2) > count) |
1da177e4 | 1663 | fraglen = count - pktlen; |
7bd8cc8f | 1664 | else |
1da177e4 | 1665 | fraglen -= 2; |
1da177e4 | 1666 | |
a75aa90c JJ |
1667 | status = |
1668 | dvb_ringbuffer_pkt_read_user(&sl->rx_buffer, | |
1669 | idx, 2, | |
1670 | buf + pktlen, | |
1671 | fraglen); | |
1672 | if (status < 0) | |
1da177e4 | 1673 | goto exit; |
a75aa90c | 1674 | |
1da177e4 LT |
1675 | pktlen += fraglen; |
1676 | } | |
1677 | ||
1678 | if ((hdr[1] & 0x80) == 0) | |
1679 | last_fragment = 1; | |
1680 | dispose = 1; | |
1681 | } | |
1682 | ||
a75aa90c | 1683 | idx2 = dvb_ringbuffer_pkt_next(&sl->rx_buffer, idx, &fraglen); |
1da177e4 | 1684 | if (dispose) |
a75aa90c | 1685 | dvb_ringbuffer_pkt_dispose(&sl->rx_buffer, idx); |
1da177e4 LT |
1686 | idx = idx2; |
1687 | dispose = 0; | |
1688 | } while (!last_fragment); | |
1689 | ||
1690 | hdr[0] = slot; | |
1691 | hdr[1] = connection_id; | |
e252984c DC |
1692 | status = copy_to_user(buf, hdr, 2); |
1693 | if (status) { | |
1694 | status = -EFAULT; | |
1da177e4 | 1695 | goto exit; |
e252984c | 1696 | } |
1da177e4 LT |
1697 | status = pktlen; |
1698 | ||
ded92846 | 1699 | exit: |
1da177e4 LT |
1700 | return status; |
1701 | } | |
1702 | ||
1da177e4 LT |
1703 | /** |
1704 | * Implementation of file open syscall. | |
1705 | * | |
fbefb1a8 MCC |
1706 | * @inode: Inode concerned. |
1707 | * @file: File concerned. | |
1da177e4 | 1708 | * |
46e42a30 | 1709 | * return: 0 on success, <0 on failure. |
1da177e4 LT |
1710 | */ |
1711 | static int dvb_ca_en50221_io_open(struct inode *inode, struct file *file) | |
1712 | { | |
0c53c70f JS |
1713 | struct dvb_device *dvbdev = file->private_data; |
1714 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1715 | int err; |
1716 | int i; | |
1717 | ||
46b4f7c1 | 1718 | dprintk("%s\n", __func__); |
1da177e4 LT |
1719 | |
1720 | if (!try_module_get(ca->pub->owner)) | |
1721 | return -EIO; | |
1722 | ||
1723 | err = dvb_generic_open(inode, file); | |
226835d7 MS |
1724 | if (err < 0) { |
1725 | module_put(ca->pub->owner); | |
1da177e4 | 1726 | return err; |
226835d7 | 1727 | } |
1da177e4 LT |
1728 | |
1729 | for (i = 0; i < ca->slot_count; i++) { | |
a75aa90c | 1730 | struct dvb_ca_slot *sl = &ca->slot_info[i]; |
1da177e4 | 1731 | |
a75aa90c JJ |
1732 | if (sl->slot_state == DVB_CA_SLOTSTATE_RUNNING) { |
1733 | if (!sl->rx_buffer.data) { | |
a1ca23d1 JJ |
1734 | /* |
1735 | * it is safe to call this here without locks | |
1736 | * because ca->open == 0. Data is not read in | |
1737 | * this case | |
1738 | */ | |
a75aa90c | 1739 | dvb_ringbuffer_flush(&sl->rx_buffer); |
1da177e4 | 1740 | } |
1da177e4 LT |
1741 | } |
1742 | } | |
1743 | ||
1744 | ca->open = 1; | |
1745 | dvb_ca_en50221_thread_update_delay(ca); | |
1746 | dvb_ca_en50221_thread_wakeup(ca); | |
1747 | ||
da677fe1 MK |
1748 | dvb_ca_private_get(ca); |
1749 | ||
1da177e4 LT |
1750 | return 0; |
1751 | } | |
1752 | ||
1da177e4 LT |
1753 | /** |
1754 | * Implementation of file close syscall. | |
1755 | * | |
fbefb1a8 MCC |
1756 | * @inode: Inode concerned. |
1757 | * @file: File concerned. | |
1da177e4 | 1758 | * |
46e42a30 | 1759 | * return: 0 on success, <0 on failure. |
1da177e4 LT |
1760 | */ |
1761 | static int dvb_ca_en50221_io_release(struct inode *inode, struct file *file) | |
1762 | { | |
0c53c70f JS |
1763 | struct dvb_device *dvbdev = file->private_data; |
1764 | struct dvb_ca_private *ca = dvbdev->priv; | |
0c12c1bf | 1765 | int err; |
1da177e4 | 1766 | |
46b4f7c1 | 1767 | dprintk("%s\n", __func__); |
1da177e4 LT |
1768 | |
1769 | /* mark the CA device as closed */ | |
1770 | ca->open = 0; | |
1771 | dvb_ca_en50221_thread_update_delay(ca); | |
1772 | ||
1773 | err = dvb_generic_release(inode, file); | |
1774 | ||
1775 | module_put(ca->pub->owner); | |
1776 | ||
da677fe1 MK |
1777 | dvb_ca_private_put(ca); |
1778 | ||
0c12c1bf | 1779 | return err; |
1da177e4 LT |
1780 | } |
1781 | ||
1da177e4 LT |
1782 | /** |
1783 | * Implementation of poll() syscall. | |
1784 | * | |
fbefb1a8 MCC |
1785 | * @file: File concerned. |
1786 | * @wait: poll wait table. | |
1da177e4 | 1787 | * |
46e42a30 | 1788 | * return: Standard poll mask. |
1da177e4 | 1789 | */ |
8ec6107a | 1790 | static unsigned int dvb_ca_en50221_io_poll(struct file *file, poll_table *wait) |
1da177e4 | 1791 | { |
0c53c70f JS |
1792 | struct dvb_device *dvbdev = file->private_data; |
1793 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1794 | unsigned int mask = 0; |
1795 | int slot; | |
1796 | int result = 0; | |
1797 | ||
46b4f7c1 | 1798 | dprintk("%s\n", __func__); |
1da177e4 | 1799 | |
7bd8cc8f | 1800 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) |
1da177e4 | 1801 | mask |= POLLIN; |
1da177e4 LT |
1802 | |
1803 | /* if there is something, return now */ | |
1804 | if (mask) | |
1805 | return mask; | |
1806 | ||
1807 | /* wait for something to happen */ | |
1808 | poll_wait(file, &ca->wait_queue, wait); | |
1809 | ||
7bd8cc8f | 1810 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) |
1da177e4 | 1811 | mask |= POLLIN; |
1da177e4 LT |
1812 | |
1813 | return mask; | |
1814 | } | |
1da177e4 | 1815 | |
784e29d2 | 1816 | static const struct file_operations dvb_ca_fops = { |
1da177e4 LT |
1817 | .owner = THIS_MODULE, |
1818 | .read = dvb_ca_en50221_io_read, | |
1819 | .write = dvb_ca_en50221_io_write, | |
16ef8def | 1820 | .unlocked_ioctl = dvb_ca_en50221_io_ioctl, |
1da177e4 LT |
1821 | .open = dvb_ca_en50221_io_open, |
1822 | .release = dvb_ca_en50221_io_release, | |
1823 | .poll = dvb_ca_en50221_io_poll, | |
6038f373 | 1824 | .llseek = noop_llseek, |
1da177e4 LT |
1825 | }; |
1826 | ||
738a1b1e | 1827 | static const struct dvb_device dvbdev_ca = { |
1da177e4 LT |
1828 | .priv = NULL, |
1829 | .users = 1, | |
1830 | .readers = 1, | |
1831 | .writers = 1, | |
738a1b1e | 1832 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
e4fd3bc5 | 1833 | .name = "dvb-ca-en50221", |
738a1b1e | 1834 | #endif |
1da177e4 LT |
1835 | .fops = &dvb_ca_fops, |
1836 | }; | |
1837 | ||
96375b7a | 1838 | /* ************************************************************************** */ |
1da177e4 LT |
1839 | /* Initialisation/shutdown functions */ |
1840 | ||
1da177e4 LT |
1841 | /** |
1842 | * Initialise a new DVB CA EN50221 interface device. | |
1843 | * | |
fbefb1a8 | 1844 | * @dvb_adapter: DVB adapter to attach the new CA device to. |
46e42a30 | 1845 | * @pubca: The dvb_ca instance. |
fbefb1a8 MCC |
1846 | * @flags: Flags describing the CA device (DVB_CA_FLAG_*). |
1847 | * @slot_count: Number of slots supported. | |
1da177e4 | 1848 | * |
46e42a30 | 1849 | * return: 0 on success, nonzero on failure |
1da177e4 LT |
1850 | */ |
1851 | int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, | |
1852 | struct dvb_ca_en50221 *pubca, int flags, int slot_count) | |
1853 | { | |
1854 | int ret; | |
1855 | struct dvb_ca_private *ca = NULL; | |
1856 | int i; | |
1857 | ||
46b4f7c1 | 1858 | dprintk("%s\n", __func__); |
1da177e4 LT |
1859 | |
1860 | if (slot_count < 1) | |
1861 | return -EINVAL; | |
1862 | ||
1863 | /* initialise the system data */ | |
bacba9e5 JJ |
1864 | ca = kzalloc(sizeof(*ca), GFP_KERNEL); |
1865 | if (!ca) { | |
1da177e4 | 1866 | ret = -ENOMEM; |
a2bbf5d0 | 1867 | goto exit; |
1da177e4 | 1868 | } |
da677fe1 | 1869 | kref_init(&ca->refcount); |
1da177e4 LT |
1870 | ca->pub = pubca; |
1871 | ca->flags = flags; | |
1872 | ca->slot_count = slot_count; | |
bacba9e5 JJ |
1873 | ca->slot_info = kcalloc(slot_count, sizeof(struct dvb_ca_slot), |
1874 | GFP_KERNEL); | |
1875 | if (!ca->slot_info) { | |
1da177e4 | 1876 | ret = -ENOMEM; |
a2bbf5d0 | 1877 | goto free_ca; |
1da177e4 | 1878 | } |
1da177e4 | 1879 | init_waitqueue_head(&ca->wait_queue); |
1da177e4 LT |
1880 | ca->open = 0; |
1881 | ca->wakeup = 0; | |
1882 | ca->next_read_slot = 0; | |
1883 | pubca->private = ca; | |
1884 | ||
1885 | /* register the DVB device */ | |
96375b7a JJ |
1886 | ret = dvb_register_device(dvb_adapter, &ca->dvbdev, &dvbdev_ca, ca, |
1887 | DVB_DEVICE_CA, 0); | |
1da177e4 | 1888 | if (ret) |
a2bbf5d0 | 1889 | goto free_slot_info; |
1da177e4 LT |
1890 | |
1891 | /* now initialise each slot */ | |
1892 | for (i = 0; i < slot_count; i++) { | |
a75aa90c JJ |
1893 | struct dvb_ca_slot *sl = &ca->slot_info[i]; |
1894 | ||
1895 | memset(sl, 0, sizeof(struct dvb_ca_slot)); | |
1896 | sl->slot_state = DVB_CA_SLOTSTATE_NONE; | |
1897 | atomic_set(&sl->camchange_count, 0); | |
1898 | sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; | |
1899 | mutex_init(&sl->slot_lock); | |
1da177e4 LT |
1900 | } |
1901 | ||
30ad64b8 NS |
1902 | mutex_init(&ca->ioctl_mutex); |
1903 | ||
1da177e4 LT |
1904 | if (signal_pending(current)) { |
1905 | ret = -EINTR; | |
a2bbf5d0 | 1906 | goto unregister_device; |
1da177e4 LT |
1907 | } |
1908 | mb(); | |
1909 | ||
1910 | /* create a kthread for monitoring this CA device */ | |
9320874a CH |
1911 | ca->thread = kthread_run(dvb_ca_en50221_thread, ca, "kdvb-ca-%i:%i", |
1912 | ca->dvbdev->adapter->num, ca->dvbdev->id); | |
1913 | if (IS_ERR(ca->thread)) { | |
1914 | ret = PTR_ERR(ca->thread); | |
b3ad24d2 MCC |
1915 | pr_err("dvb_ca_init: failed to start kernel_thread (%d)\n", |
1916 | ret); | |
a2bbf5d0 | 1917 | goto unregister_device; |
1da177e4 | 1918 | } |
1da177e4 LT |
1919 | return 0; |
1920 | ||
a2bbf5d0 ME |
1921 | unregister_device: |
1922 | dvb_unregister_device(ca->dvbdev); | |
1923 | free_slot_info: | |
1924 | kfree(ca->slot_info); | |
1925 | free_ca: | |
1926 | kfree(ca); | |
1927 | exit: | |
1da177e4 LT |
1928 | pubca->private = NULL; |
1929 | return ret; | |
1930 | } | |
82ec19e4 | 1931 | EXPORT_SYMBOL(dvb_ca_en50221_init); |
1da177e4 | 1932 | |
1da177e4 LT |
1933 | /** |
1934 | * Release a DVB CA EN50221 interface device. | |
1935 | * | |
46e42a30 | 1936 | * @pubca: The associated dvb_ca instance. |
1da177e4 LT |
1937 | */ |
1938 | void dvb_ca_en50221_release(struct dvb_ca_en50221 *pubca) | |
1939 | { | |
0c53c70f | 1940 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
1941 | int i; |
1942 | ||
46b4f7c1 | 1943 | dprintk("%s\n", __func__); |
1da177e4 LT |
1944 | |
1945 | /* shutdown the thread if there was one */ | |
9320874a | 1946 | kthread_stop(ca->thread); |
1da177e4 | 1947 | |
7bd8cc8f | 1948 | for (i = 0; i < ca->slot_count; i++) |
1da177e4 | 1949 | dvb_ca_en50221_slot_shutdown(ca, i); |
7bd8cc8f | 1950 | |
4d5030b6 | 1951 | dvb_remove_device(ca->dvbdev); |
da677fe1 | 1952 | dvb_ca_private_put(ca); |
1da177e4 LT |
1953 | pubca->private = NULL; |
1954 | } | |
82ec19e4 | 1955 | EXPORT_SYMBOL(dvb_ca_en50221_release); |